Graft serverlessworkflow.github.io history to preserve all contributors

[ricardozanini]

Summary

This PR grafts the complete git history from the old serverlessworkflow/serverlessworkflow.github.io repository onto the current repository, preserving all 464 commits and contributors from the original project.

What Changed

Git History:

• Before: 10 commits starting from July 2026
• After: 474 commits starting from July 2020
• All original contributors (Tihomir Surdilovic, Ricardo Zanini, Charles d'Avernas, and 50+ others) are now in the history

Files:

• ✅ NO files changed - this is purely a history operation
• ✅ No unwanted static/ directory from old repo
• ✅ Only public/schemas/ and Astro site files remain

How It Works

Used git replace --graft + git filter-branch to connect the two repository histories:

New repo: a79800f "Initial site content..." 
            ↓ (grafted as child of)
Old repo: 1eeb21e "Merge pull request #270..." (last commit from serverlessworkflow repo)
            ↓
          ... 464 commits of history ...
            ↓  
          2a24478 "Initial Website commit" (July 2020)

Verification

# Total commits
git rev-list --count HEAD  # 474

# No static/ directory
git ls-tree -r HEAD | grep static  # (empty)

# First commit
git log --reverse --oneline | head -1
# 2a24478 Initial Website commit (2020-07-15)

Impact

• 🔴 Breaking: All commit SHAs changed - existing PRs will close
• ✅ Benefit: Complete project history and contributor attribution
• ✅ Benefit: Better understanding of specification evolution

Next Steps

After merging:

1. Force push will be required to update upstream
2. Open PRs (Update URLs to open-workflow-specification.org and new GitHub org #12, Embed the new OWS Editor into the website #11) will need to be recreated with new commit SHAs
3. Contributors should re-clone or run git pull --rebase

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/cc @cdavernas @lornakelly @dgutierr

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